In version 6.5 Microchip MiWi software and all previous versions including legacy products, the stack is validating only two out of four Message Integrity Check (MIC) bytes.
ww1.microchip.com/downloads/en/DeviceDoc/asf-release-notes-3.50.0.100-readme.pdf
ww1.microchip.com/downloads/en/DeviceDoc/asf-release-notes-3.51.0.101-readme.pdf
www.microchip.com/en-us/development-tools-tools-and-software/libraries-code-examples-and-more/advanced-software-framework-for-sam-devices#Downloads
www.microchip.com/en-us/products/wireless-connectivity/software-vulnerability-response/miwi-software-vulnerability
www.microchip.com/en-us/products/wireless-connectivity/sub-ghz/miwi-protocol
www.microchip.com/product-change-notifications/#/